I got into similar problems in my old PHP days - I only had FTP access and ability to run PHP; dump import in PHPMyAdmin was failing because of the execution time limit.

I wrote a simple script that basically read the dump statement by statement and ended with a refresh header while remembering the offset, when getting too close to execution limit. It's definitely not 100 percent errorproof, but it worked for the dumps I needed it for.

I hope I'm not gonna get lynched for posting PHP code here :-)

<?php
define('CUSHION', 5);
define('FILENAME', 'dump.sql');
define('BLOCK_SIZE', 4000);
define('LINE_SEP', "\n");
define('STMT_SEP', ";\n");
define('COMMENT', "--");

error_reporting(E_ALL);
ini_set('display_errors', 1);

$time_to_end = time() + intval(ini_get('max_execution_time')) - CUSHIO
+N;

$db = mysql_connect('localhost', 'username', 'passwd');
mysql_select_db('dbname', $db);
mysql_query('SET NAMES utf8');
mysql_query('SET CHARACTER SET utf8');

$file = fopen(FILENAME, 'r');
$offset = (empty($_GET['o']) ? 0 : $_GET['o']);
fseek($file, $offset, SEEK_SET);

$counter = 0;
$block = '';
$chopped = '';
$errors = array();

while (time() < $time_to_end) {
  $block .= fread($file, BLOCK_SIZE);
  $start = 0;
  while(($end = strpos($block, STMT_SEP, $start)) !== false) {
    $stmt = $chopped . substr($block, $start, $end-$start);
    $start = $end + 2;
    while (strpos($stmt, COMMENT) === 0) {
      $new_start = strpos($stmt, LINE_SEP);
      $stmt = substr($stmt, $new_start + 1);
        }
    if (mysql_query($stmt, $db)) {
      $counter++;
      $chopped = '';
    }
    else {
      $errors[] = mysql_error();
      $errors[] = $stmt;
      if (!mysql_ping()) {
        $offset = ftell($file) - STMT_SEP + $start - 2 - strlen($stmt)
+;
        header('Refresh: 0; URL=loader.php?o='.$offset);
        include('header.inc');
        echo 'Connection to db was interrupted, couldn\'t finish state
+ment: '.$stmt;
        include('footer.inc');
        exit;
      }
      $chopped = $stmt . STMT_SEP;
    }
  }
  $block = substr($block, $start);
}

$offset = ftell($file) - strlen($block) - strlen($chopped);
if (!feof($file))
  header('Refresh: 0; URL=loader.php?o='.$offset);
include('header.inc');
echo 'Successfully executed ' . $counter . ' statements, execution end
+ed at position ' . $offset;
if (!empty($errors))
  echo '<br>There were errors:<br>' . implode('<br>', $errors);
if (feof($file))
  echo '<br>And it\'s finished.';
include('footer.inc');
?>
[download]

header.inc and footer.inc are generic HTML fragments. I hope no error sneaked in when I translated the names and texts into english.